Intended for use with the numerous brushless DC (BLDC) motors being featured in modern automotive designs, the TB9083FTG is designed in accordance with ISO 26262 (2nd edition) and supports up to ASIL-D level functional safety. Among its key applications are electric power steering systems (EPS), electric braking and shift-by-wire transmissions.
By implementing the AEC-Q100-qualified TB9083FTG, automotive design engineers will be able to control and drive the external N-channel power MOSFETs needed for three-phase BLDC motor driving. A built-in fail-safe safety relay pre-driver complements the three-phase pre-driver. In addition, a charge pump, motor current detector circuit and internal oscillator circuitry are also included, along with an SPI communication interface (featuring an integrated CRC check).
There are multiple error detection functions too - such as undervoltage (VB, VCC, VCC_OP), overvoltage (VCC, VCC_OP, VCPH, external MOSFET VGS), over-temperature and an external MOSFET VDS detector. The trigger threshold, response action and other settings can all be conveniently configured via the SPI interface.
The high level of integration reduces the need for external components, thereby lowering the part count, as well as curbing system size and cost. This is particularly useful in motor drive applications where redundancy is required.
The TB9083FTG driver IC is housed in a small P-VQFN48-0707-0.50-005 package that measures just 7.0mm x 7.0mm (resulting in a 66% reduction in footprint compared Toshiba’s previous generation product). The inclusion of a wettable flank structure enables visual inspection of solder joints using automatic optical inspection (AOI) equipment - thereby contributing to enhanced solder joint reliability.
